Ermengarde married Lothaire I Emperor of Holy Roman Empire, son of Louis I Emperor Holy Roman Empire and Princess Of Hesbaye Ermengarde, on Oct 15, 0821 in Thionville, Moselle, France. (Lothaire I Emperor of Holy Roman Empire was born in 0795 in Altdork, Bavaria,19 died on Sep 29, 0855 in Pruem-Rheinland, Prussia and was buried in St. Sauveur, France.)